Yarn-trap for knitting-machines.



J PEARSON & H. CARTER. I. J. PEARSON, ADMINISTRATOR or J. PEARSON, DEGD.

YARN TRAP FOE KNITTING MACHINES. APPLIOYAIION FILED NOV. 4, 1907.Patented y 19/10 2 SHEETS-SHEET 1.

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APPLICATION IILED Nov. 4, 1907. P t t d May 24 191() 2 SHEETS-SHEET 2.

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UNTTED STATES PATENT OFFICE.

JOSEPH PEARSON, OF PHILADELPHIA, AND HARRY CARTER, OF WRIGHTSVILLE,PENNSYLVANIA; JOSEPH J. PEARSON ADMINISTRATOR OF SAID JOSEPH PEARSON,

DECEASED.

YARN-TRAP FOR KNITTING-MACHINES.

Specification of Letters Patent.

Patented May 24, 1910.

To all whom it may concern:

Be it known that we, Josnrn PEARSON, a citizen of the United States,residing in the city and county of Philadelphia, State of Pennsylvania,and HARRY CARTER, a citizen of the United States, residing atVVrightsville, in the county of York, State of Penn sylvania, haveinvented a new anduseful Yarn-Trap for Knitting-Machines, of which thefollowing is a specification.

In knitting machines especially adapted for knitting articles such asstockings, in which the heel and toe are made on the same machine, thereis a liability in the ordinary construction of such machines of theslack yarn being drawn into the stocking during the reciprocatingmovement of the machine thereby causing defective work.

The object of our invention is to devise an automatic yarn trap withwhich the bers, an adjustable tension device therefor and means forsecuring said device to the knitting machine.

In our preferred embodiment, our devlce comprises a plate adapted to besecured to the machine and provided with a preferably angularly inclinedyarn guide, said plate having a rod attached thereto, on which ismounted a pair of spring pressed members, the outer ends of which aredeflected outwardly, said presser members being normally maintained inengagement by means of a tension device and said plate being providedwith pins whereby the lateral movement of said presser members isprevented.

Our invention further consists of other novel features ofconstructionall as will be hereinafter fully set forth.

In order to illustrate our invention we have shown in the accompanyingdrawings one form thereof, since this embodiment best illustrates theprinciples thereof and has been found in practice to give satisfactoryand reliable results, although it is to be understood that the variousinstrumenin a different relation to each other.

thereto. Fig. 2 represents a perspective view similar to Fig. 1 butshowing the parts Fi 8 represents a perspective view of the yai ii trapin detached position. Fig. 4 represents a s de elevation, partly brokenaway, of a portion of the knitting machine showing certain features ofthe operatingmechanism.

Similar numerals of reference indicate corresponding parts in thefigures.

Referring to the drawings :-1 designates the upper portion of the frameof thema chine, in which is mounted a laterally movable rod or shaft 2,said shaft having .adjustably mounted thereon the contact members 3 and4, which are adapted to be actuated at a suitable time bythe deflectedend or roller of the lever 5, whichis suitably fulcrumed to the frame 1,said lever 5 being provided with a weighted arm or vto a deflected lever7 which is adapted to engage at certain times a spring 8 mounted on arod 9 carried by the bracket 10, supported by the frame 1, said spring 8havingat its outer or, free end an eyelet 11 through which the yarn isadapted to pass. The

lever 5 has also securedthereto a lever 12 which has secured at its enda bracket 13, the outer end of which. is deflected to form a set withinwhich is adjustably mounted the rod 14 by means of a set screw 15, itbeing noted that said rod 14 is journaled in the frame 1 in which it hasa bearing. The lever 5 is rocked each time the machine changes from areciprocating motion to a circular motion and when it changes from acircular to a reciprocating motion. The rod 14 works within the tube orcylinder 16 which is secured to the bracket 17 and theframe l and isadapted to receive the splicing yarn when a reinforced fabric is beingmade.

18 designates a bracket carried by the frame 1 to which is secured aplate or support 19, by means of a set screw or equivaent device 20.

21 designates a clip or clamp by means of which the hollow conduit orguide 22 is secured thereto.

23 designates a rod one end of which fixed to the plate 19 in anysuitable manner, the other end thereof being suitably threaded therebyadapting the same to receive the adjusting nut 24 and the lock nut 25.

26 designates a spiral spring mounted on the rod 23 and engaging theupper presser member 27 one end of which is mounted on the member 23 andthe outer end of which is deflected outwardly as indicated at 28. Theinner presser member 29 is also mounted on the member 23 and has itsouter end deflected in a reverse direction to that of the member 28, asis indicated at 30.

31 and 32 designate pins fixed to the plate 19 on opposite sides of themembers 27 and 29 whereby lateral movement is positively prevented.These pins also serve to limit the distance to which the knitting yarnmay pass between the presser members 27 and 29. It is to be noted thatthe yarn guide 22-,is preferably angularly located with respect it) thepresser members 27 and 29.

35 designates a stop for the take-up spring 8 and with which it engagesin one of its positions as seen in Fig. 1.

36 designates a rod one end of which is pivoted to the arm orcounterbalance 6 the other end thereof passing through the lever 37mounted on a shaft 38. The rod 36 has mounted thereon on opposite sidesof the lever 37 the adjusting nuts 39 and 40 between which and the lever37 are located the springs 41 and 42 respectively.

43 designates a lever fixedly mounted on the shaft 38 and to which ispivoted a rod 44 which at its free end is provided with a roller 45which works in the groove 46 of a cam 47, the latter being mounted on ashaft 48 which is controlled by the driving shaft of the knittingmachine.

49 designates a ratchet wheel rigidly mounted on the shaft 48 so as torotate in unison with the cam member 47. The ratchet wheel 49 co-actswith a suitable pattern chain (not shown).

The operation of our novel construction of yarn trap will now beapparent.

hen the machine is making circular work the parts are in the positionindicated in Fig. 1, at which time the knitting yarn 33 passes from thebobbin through the guide 22 and thence to the aperture 34; from thencethe yarn passes through the hollow member 16 and thence to the needlesas will be apparent to those skilled in this art, it being noted thatthe yarn at this time does not engage with the presser members 27 and29.

hen the machine is making the heel or toe of the stocking or similarwork, the needle cylinder does not rotate but oscillates back and forth,whereupon the lever 5 is moved toward the right to the positionindicated in Fig. 2 so that the deflected lever 7 is disengaged from thespring 8 and said spring is permitted to assume its normal po sition asis indicated in Fig. 2. This causes the yarn 33 to be drawn upwardlysince the same passes through the eyelet 11 of the spring 8 and the yarnis forced between the spring pressed members 27 and 29 as is in dicatedin Fig. 2, so that yarn will not be drawn from the bobbin at this time.On the return movement of the needle cylinder the arm 5 is moved to theposition indicated in Fig. 1 whereupon the lever 7 will cause the spring8 to be depressed and the parts will assume the position seen in Fig. 1,at which time the yarn 33 does not engage with the presser members 27and 29 but passes freely to the needle cylinder.

It is to be understood that the lever 5 is automatically rocked when themachine changes from a reciprocating motion to a circular motion or froma circular motion to a reciprocating motion. When the lever 5 is rockedtoward the left it engages the block 4 and causes the shaft 2 to bemoved toward the left and at such time the splicing yarn is out off bymechanism actuated by the rod 2. At the same time, owing to theengagement of the member 7 with the take-up spring 8, the tension istaken from said take-up spring. It will be apparent that when the lever5 is rocked in areverse direction toward the right it will engage thecontact member 3 and cause the rod 2 and its adjuncts to be moved towardthe right, as seen in Fig. 2. The purpose of the rod 2, contact members3 and 4, and their adjuncts, is to cut out the splicing yarn when it isnot desired to reinforce the fabric which is being produced.

We wish to call special attention to the members 31 and 32 since theseserve not only to prevent improper lateral movement of the pressermembers 27 and 29, but they limit the extent to which the knitting yarnmay pass upwardly between said presser members. By such a constructionthere is no liability of the lint from the yarn being retained betweenthe presser members and thus clogging the same.

The means for operating the lever 5 at the proper time is old in the artsince the same corresponds to the construction shown in the patent toFranck No. 681,209, August 27, 1901. Since large numbers of thesemachines are now in use, it is deemed unnecessary to describe in detailthe operation of this portion of the knitting machine since the same iswell known to those skilled in the art, and reference may be had to theabove mentioned patent for a detailed description of the operationthereof.

e have deemed it unnecessary to show or describe in detail theconstruction and operation of the entire machine since our inventionlies wholly in the novel construction of our yarntrap as is indicated inFig. 3, which is suitably adapted to be used in conjunction with such amachine as we have herein described and we have shown the upper portionof a knitting machine for the purpose of more clearly illustrating themanner in which the yarn is trapped or held during the reciprocation ofthe needle in one direction, so that there is no liability of slack yarnbe ing drawn into the fabric, thereby causing defective work.

The tension of the spring 23 against the presser member 27 may beadjusted as desired by means of the adjusting nut 24, which latter ismaintained in its adjusted position by means of the lock nut 25.

The presser members 27and 29 are deflected outwardly at their outer endsso that the thread will always pass therebetween atthe desired time. Anyimproper lateral movement of the presser members is positively preventedowing to the provision of the pins or studs 31 and 82.

It will now be apparent that we have devised a novel and usefulconstruction of yarn trap for knitting machine which embodies thefeatures of advantage enumerated as desirable in the statement ofinvention and the above description and while we have inthe presentinstance shown and described a preferred embodiment thereof which givesin practice satisfactory and reliable results, it is to be understoodthat the same is susceptible of modification in various particularswithout departing from the spirit and scope of the invention orsacrificing any of its advantages.

Having thus described our invention which we claim as new and desire tosecure by Letters Patent is 1. In a device of the character described, asupport, securing means therefor, presser members carried by saidsupport, a yarn guide for said presser members carried by said support,a tension device for said members, and means for preventing lateralmovement of said members, said means also limit ing the movement of theyarn between said members.

2. In a device of the character described, a support, securin meanstherefor, a yarn guide carried ther by, a rod secured to said support,presser members having one end loosely mounted on said rod, a tensiondevice engaging one of said members, and

means for preventing improper lateral movement of said members, saidmeans also limiting the movement of the yarn between said members.

In a device of the character described, a support, securing meanstherefor, a yarn guide carried by said support, a rod carried by saidsupport, presser members having one end movably mounted on said rod, anadjusting nut on said rod, a spring intermediate said nut and one ofsaid presser members, a lock nut for said adjusting nut, and means forpreventing improper lateral movement of said members, said means alsolimiting the movement of the yarn between said members.

I. In a device of the character described, a support, securing meanstherefor, a yarn guide carried by said support, a rod carried by saidsupport, presser members having one end loosely mounted on said rod, atension device engaging one of said members, and pins on opposite sidesof said members and engaging said members to prevent their lateralmovement.

5. In a device of the character described, a support, securing meanstherefor, a yarn guide carried by said support, a rod carried by saidsupport, presser members each having one end outwardly deflected andtheir outer ends loosely mounted on said rod, a tension device engagingone of said members, and means for preventing improper lateral movementof said members, said means also limiting the movement of the yarnbetween said members.

(5. In a device of the character described, a support, securing meanstherefor, a yarn guide secured thereto and extending at an angle to thelongitudinal axis of said support, a rod carried by said support,presser members having outwardly deflected ends and loosely mounted onsaid rod, a tension device engaging one of said members, and pinssecured to said plate on opposite sides of said members to prevent theirlateral movement.

7. In a device of the character described, the combination with aresilient yarn guide and means for intermittently actuating the same, ofa support, means for securing said support in proximity to said guide, ayarn guide carried by said support, a plurality of presser membersloosely carried by said support, a tension device for said members, andmeans for preventing improper. lateral movement of said members, saidmeans also limiting the movement of the yarn between said members.

JOSEPH PEARSON. HARRY CARTER. lVitnesses H. IV. HUNTZBERGER, C. D.MCVAY.

